unitedhealthcare. ♪ use freedom and get cash back. ♪ack. ♪ five percent at best buy. ♪ wow my definition is high. activate your 5% cash back at chase.com/freedom. ♪ everybody get, everybody get! ♪ now a page from our sunday morning almanac. december 2, 1942, 70 years ago today. the day a new technology was born under a grand stand at the university of chicago's stag field. for that was the day enrico ferme and his team of scientists achieved the world's first self-sustained nuclear reaction, a breakthrough they later re-enacted for the cameras. their success paved the way both for nuclear weapons and for a civilian industry that promised to transform everyday life for the better. >> here in fact is the answer to a dream as old as man himself. a giant of limitless power at man's command. >> osgood: this 1950s' promotional film foretold everything from nuclear power plants that would light up cities to new and improved means of transportation. >> while nuclear power in locomotives, submarines, ships and even very large airplan